Bake-oven.



No. 65,786. Patented June 12., 1.9.00.

R. W. TURNER.

BAKE OVEN. (Apblication filed Dec. 1 1599.)

(No Modgl.)

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: NORRJS rsrzns my. Pncnmum NITED STATES PATENT OFFIC ROBERT W. TURNER,OF WALNUT SPRINGS, TEXAS, ASSIGNOR OF ONE-HALF TO EARNEST H. TURNER ANDROBERT T. TURNER, OF SAME PLACE.

BAKE-OVEN.

SPECIFICATION forming part of Letters Patent No. 651,786, dated June 12,1900. Application filed December 1,1899. Serial No. 738,333. momma.)

To all whom it may concern;-

Be it known that I, ROBERT W. TURNER, a citizen of the United States,residing at Walnut Springs in the county of Bosque, State of Texas, haveinvented certain new and useful Improvements in Bake-Ovens, of which thefollowing is a specification, reference being had therein to theaccompanying drawing.

This invention relates to bake-ovens, and particularly to an oventhrough which a current of cool or heated air may be passed to maintainthe same at a desired temperature for either purposes of baking,evaporating, drying, or roasting substances therein, as may be founddesirable.

The invention has for an object to provide a structure by which acurrent of either cool or heated air may be passed through the hotairchamber and regulated in amount, so as to produce in said chamber anydesired degree of temperature, thus adapting the chamber for a widerange of uses inwhich heat is applied to a greater or less extent to asubstance to be dried or cooked.

A further object of the invention is to provide means by which the airmay be introdu-ced under pressure to the compartments temperature ofsaid chamber or maintaining a predetermined degree of heat therein.

Other objects and advantages of the inven- I tion will hereinafterappear in the following description, and the novel features thereof willbe particularly pointed out in the appended claims.

The drawing forming part of this specification illustrates alongitudinal vertical section through the apparatus, with a portion ofthe hot-air chamber in side elevation.

Like letters of reference indicate like parts in the drawing.

As illustrating a desirable form of the apparatus a-cold-air chamber Ahas been shown, which may be of any desired configuration and is fed bymeans of a suction-fan A, having an inlet A extending outward from theclosed chamber A and a discharge A within said chamber. This chamber maybe of any desired construction or size, dependent upon the amount of airto be supplied to the hotair chamber B, with which the cold-air chambercommunicates by means of one or more conducting-pipes G. This pipe isprovided with a coiled portion 0 of any desired extent or configuration,located within a heating apparatus D. This apparatus may be of anypreferred form or character; but for the purpose of illustrationoil-burners D have been shown beneath the coiled portion and .suppliedfrom a reservoir D above the same, while the chamber D is supplied witha suitable stack D to remove therefrom unconsumed products of combustionand provide the necessary ventilation.

The hot-air chamber B is provided with a series of compartments B, withwhich the conducting-pipe C communicates by means of a branch 0 providedwith a regulating- Valve 0 thus introducing the'heated air from theconducting-pipe at the lower portion of the compartment. At the upperportion of the compartment a discharge-pipe E is provided, whichcommunicates with each of the compartments B by means of a branch E,provided with a valve E The dischargepipe E communicates with thecold-air chamber by means of a valved connection E and with theatmosphere by means of a similar connection E whereby the heated airreturned from the oven may be permitted to escape through the valve Ewhen the valve E is closed, and when said valve E is opened the pressurein the cold-air chamber will be reduced.

For the purpose of introducing cool or cold air in the compartments ofthe heated-air chamber for the purpose of moderating the temperaturethereof or maintaining it at a predetermined degree a conducting-pipe Fis provided and communicates with the upper portion of each compartmentby means of a valved connection F. This pipe also is provided with avalve connection I? at its j uncture with the cold-air chamber. 7 Theair under pressure in this chamber can thus be introduced into thehot-air compartments by a proper regulation of the valved connections F.At the lower portion of each oompartment a cold-air-discharge pipe H isprovided with a valve H, by-which a downward ourcompartments providedwith a rent of air may be produced through the compartment for thepurpose of cooling the same,

The hot-air compartments may be provided with any suitable means forsupporting therein the material to be vaffected by the heated air. Forinstance, a roasting-drum G may be placed in one compartment and theother trays or baskets G, which support the material to be heated andpermit the air to pass freely around the same. These trays are providedwith suitable front plates G by which a tight closure is effected, andwith a transparent opening G by means of which the contents thereof maybe inspected without removing the trays. The hot-air compartments mayalso be provided with a suitable thermometer G for indicating the degreeof heat in each compartment, and it will be obvious that differentdegrees may be maintained in each of the compartments, so that diiferentclasses of work may be performed by the same apparatus at the same time.ing-cylinder may. be rotated by any desired means, as may also the fanfor producingan air-pressure wlthin the cold-air chamber.

In the operation of the heating-chambers the valve 0 will be opened, asmay also the valves E thus admitting only heated air to the compartmentsand raising the tempera? ture thereof'to the desired degree. If itrbedesired, however, to. remove from the com partments the'airwhen ladenedwith moisture or odors from .the material cooked'or dried, the valve IEwill be closed, and the heated air then escapes through the valve Etothe outer atmosphere. Now'if it be desired to reduce the temperatureof the oven or maintain the same at a certain degree the hot-air valve 0may be partly or completely closed and the cold-air valve F opened. Thisintroduces cold air into the compartments and reduces the temperaturethereof. If it therefrom any heated air.

purpose.

be desired to reduce this temperature quickly,

the coldair-discharge valve H may be opened at the bottom of thecompartment, thus creating a downward current of cold air through thecompartment and effectually removing It is also found desirable whenintroducing cold air to close the valve E of the upper discharge-pipe.

It will-be obvious that the structure of the of any desirednon-combustible material and properly insulated to prevent the escape ofheat, while the arrangement of valved conducting-pipes issuch that anydesired degree of heat maybe maintained in each of the compartmentsindependent of the remaining. compartments, thus adapting the apparatusfordiflt'erent simultaneous op'erationssuch as drying, roasting, andbakingwhile .by a proper adjustment ofthe valves all of. thecompartments maybe used for any preferred rIt'will be obvious thatchanges maybe made inthedetailsofi constructionand configura reticulatedThe roasttion of the several parts of this apparatus -without-departingfrom the spirit of this invention as defined by the appended claims.

pressure of airtherein, of a' closedyhot-air chamber, a conducting-pipeconnecting said chambers, means for heating said pipe, ahotair-discharge pipe leading from said hot-air chamber, an independentcold-air pipe com municating with said cold and hot air chambers, and acold air discharge pipe at the lower' portion of said hot-air chamber:substantially as specified.

3.. In a bake-oven, the combination with a cold-air chamber and meansfor producing a pressure of air therein, of a heated-air chamberprovided with compartments, a conducting-pipe provided with aheating-coil and ex tending from said cold-airchamber tothe lowerportion of said compartments, means for heating said coil, and a 'coldair feed-pipe communicating with the upper portion of said compartmentand with the cold-air chamber; substantially as specified.

i 4. In a bake oven, the combination with a cold -air chamber and meanstorproducing a pressure of air therein, of a heated-air cham berprovided with compartments, aconductr ing-pipe provided withaheating-coil and extending from said cold-air chamber-to the lowerportion of said compartments, means for heating said coil, adischarge-pipecominunicating with the upper portion of said compartment,and a coldair pipe communicating with'said, cold-air chamber and withthe'upper portion of said compartments 3 substantially as specified. I

5. In a bake-oven, the combination'with a cold-air chamber and means forproducing a pressure of air therein, of a heated=air chamber providedwithcompartmentm'a conducting-pipe provided with a heating-coil andextending from said cold-air chamber to the lower portion of saidcompartments, means for heating said coil, a discharge-pipecomcompartment, acold-air pipe communicating with said cold-air chamberand with-the upper portion of said -compartments,-a cold-air dischargeat the lower portion, andsuitable valves controlling the communicationof i all of said pipes with said compartmentsysub- ,stantially asspecified. r

' ,In abake-ovelythe combination with a cold-air chamber and means forproducing a pressure of air therein of a heated-air chamber providedwith compartments, a conducting-pipe provided with a heating-coil andextending from said cold-air chamber to the lower portion of saidcompartments, means for heating said coil, a discharge-pipecommunicating with the upper portion of said compartment, a cold-airpipe communicating with said cold-air chamber and with the up perportion of said compartments, a cold-air discharge at the lower portion,suitable valves controlling the communication of all of said pipes withsaid compartments, and reticulated supporting-trays within saidcompartments; substantially as specified.

7. In a bake-oven, the combination of a coldair chamber, a pressure-fanlocated therein, a hot-air chamber provided with a 20 series ofcompartments, a coiled conducting- ROBERT W. TURNER;

Witnesses:

N. A. MASSEY, J. A. MASSEY

